Service Monitor
The FM/AM500A Commumication Service Monitor is a small, lightweight, rugged and dependable test instrument with the following features: FM signal generator AM signal generator Sensitive 2 ?V receiver for AM, FM, and SSB 10 Hz to 9999.9 Hz variable audio generator plus audio frequency error meter 1 kHz audio generator Frequency error meter with 1 Hz resolution 0.2 PPM TCXO SINAD/Distortion meter Microphone input Audio demodulator output